ES2004803A6 - A process for the preparation of sulphide-free alkali liquor. - Google Patents
A process for the preparation of sulphide-free alkali liquor.Info
- Publication number
- ES2004803A6 ES2004803A6 ES8702388A ES8702388A ES2004803A6 ES 2004803 A6 ES2004803 A6 ES 2004803A6 ES 8702388 A ES8702388 A ES 8702388A ES 8702388 A ES8702388 A ES 8702388A ES 2004803 A6 ES2004803 A6 ES 2004803A6
- Authority
- ES
- Spain
- Prior art keywords
- sulphide
- copper
- alkali liquor
- alkali
- oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0085—Introduction of auxiliary substances into the regenerating system in order to improve the performance of certain steps of the latter, the presence of these substances being confined to the regeneration cycle
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/20—Preparation by reacting oxides or hydroxides with alkali metal salts
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention relates to a process for the preparation of an essentially sulphide-free alkali liquor starting from an alkali sulphide source, characterized by reacting in alkaline medium the alkali sulphide source with copper (II) oxide and/or copper (I) oxide, optionally with the addition of water, in a mole ratio oxide to sulphide (calculated as alkali sulphide( (charging) of at least 0.9 and allowing the mixture obtained to react at a temperature of from 30 to 130 DEG C to form hydroxide in an amount equivalent to the amount of sulphide and to precipitate a solid phase consisting essentially of copper (I) sulphide, copper (II) sulphide or a mixture thereof, whereupon the solid phase is separated in a way known per se to obtain an essentially sulphide-free alkali liquor, the reaction time of the precipitation reaction being adjusted with regard to the charging and temperature selected so that the residual concentration of copper ions in the final alkali liquor is below 1 mmole/l.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8603425A SE8603425D0 (en) | 1986-08-14 | 1986-08-14 | SETTING UP SULFIDE-FREE ALKALILUT |
SE8605120A SE8605120L (en) | 1986-08-14 | 1986-11-28 | SETTING UP SULFIDE-FREE ALKALILUT |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2004803A6 true ES2004803A6 (en) | 1989-02-01 |
Family
ID=26659458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES8702388A Expired ES2004803A6 (en) | 1986-08-14 | 1987-08-13 | A process for the preparation of sulphide-free alkali liquor. |
Country Status (12)
Country | Link |
---|---|
US (1) | US4981556A (en) |
EP (1) | EP0258196B1 (en) |
KR (1) | KR900004685B1 (en) |
BR (1) | BR8704209A (en) |
CA (1) | CA1285353C (en) |
DE (1) | DE3762636D1 (en) |
ES (1) | ES2004803A6 (en) |
FI (1) | FI873520A (en) |
NO (1) | NO873400L (en) |
NZ (1) | NZ221321A (en) |
PT (1) | PT85532B (en) |
SE (1) | SE8605120L (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9117936D0 (en) * | 1991-08-20 | 1991-10-09 | Canada Inc | Production of sodium hydroxide |
FI96387C (en) * | 1994-09-19 | 2001-12-03 | Kvaerner Pulping Oy | A method for removing nitrogen oxides from the flue gases of a pulp mill |
US5508018A (en) * | 1995-05-02 | 1996-04-16 | Exxon Research And Engineering Company | Process for the regeneration of sodium hydroxide from sodium sulfide |
US8398848B2 (en) * | 2008-10-02 | 2013-03-19 | Exxonmobil Research And Engineering Company | Desulfurization of heavy hydrocarbons and conversion of resulting hydrosulfides utilizing copper metal |
US8696889B2 (en) * | 2008-10-02 | 2014-04-15 | Exxonmobil Research And Engineering Company | Desulfurization of heavy hydrocarbons and conversion of resulting hydrosulfides utilizing a transition metal oxide |
US8968555B2 (en) * | 2008-10-02 | 2015-03-03 | Exxonmobil Research And Engineering Company | Desulfurization of heavy hydrocarbons and conversion of resulting hydrosulfides utilizing copper sulfide |
RU2674198C1 (en) * | 2017-09-12 | 2018-12-05 | Открытое акционерное общество "Центральный научно-исследовательский институт бумаги" (ОАО "ЦНИИБ") | Method of preparation of cellulose for nitration |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2056929A (en) * | 1933-05-13 | 1936-10-06 | Brown Co | Production of alkaline compounds, sulphuric acid, and other valuable chemicals |
US2031844A (en) * | 1933-10-26 | 1936-02-25 | Brown Co | Manufacture of caustic soda |
US2054727A (en) * | 1935-02-08 | 1936-09-15 | Lundin Harold | Process of making paper pulp |
US2164141A (en) * | 1936-06-23 | 1939-06-27 | Brown Co | Causticization of soluble sulphides |
US3909344A (en) * | 1973-12-03 | 1975-09-30 | Erco Envirotech Ltd | Removal of sodium chloride from pulp mill operations |
US3959068A (en) * | 1974-10-24 | 1976-05-25 | The Babcock & Wilcox Company | Process and apparatus for recovery of sulfur from a polysulfide pulping operation |
ZA761255B (en) * | 1975-03-11 | 1977-03-30 | Erco Envirotech Ltd | Bleachplant operation |
US4098639A (en) * | 1975-06-17 | 1978-07-04 | Mo Och Domsjo Aktiebolag | Process for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material |
DE2533794A1 (en) * | 1975-07-29 | 1977-02-17 | Metallgesellschaft Ag | Boiling lye contg. sodium sulphite and carbonate, prodn. - from green liquor by pptn. of sulphide with iron cpds., avoids pollution |
FR2384712A1 (en) * | 1977-03-25 | 1978-10-20 | Inst Francais Du Petrole | PROCESS FOR REGENERATION OF AQUEOUS SOLUTIONS OF SODIUM, POTASSIUM AND / OR AMMONIUM SULPHIDES |
US4409066A (en) * | 1978-03-30 | 1983-10-11 | Erco Industries Limited | Bleaching procedure using chlorine dioxide and chlorine solutions |
-
1986
- 1986-11-28 SE SE8605120A patent/SE8605120L/en not_active Application Discontinuation
-
1987
- 1987-07-31 EP EP87850238A patent/EP0258196B1/en not_active Expired - Lifetime
- 1987-07-31 DE DE8787850238T patent/DE3762636D1/en not_active Expired - Fee Related
- 1987-08-04 NZ NZ221321A patent/NZ221321A/en unknown
- 1987-08-07 CA CA000544034A patent/CA1285353C/en not_active Expired - Fee Related
- 1987-08-13 ES ES8702388A patent/ES2004803A6/en not_active Expired
- 1987-08-13 BR BR878704209A patent/BR8704209A/en unknown
- 1987-08-13 NO NO873400A patent/NO873400L/en unknown
- 1987-08-13 PT PT85532A patent/PT85532B/en not_active IP Right Cessation
- 1987-08-13 FI FI873520A patent/FI873520A/en not_active IP Right Cessation
- 1987-08-14 KR KR1019870008961A patent/KR900004685B1/en not_active IP Right Cessation
-
1990
- 1990-04-11 US US07/508,546 patent/US4981556A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FI873520A (en) | 1988-02-15 |
PT85532B (en) | 1990-05-31 |
KR880003066A (en) | 1988-05-13 |
US4981556A (en) | 1991-01-01 |
NZ221321A (en) | 1989-09-27 |
KR900004685B1 (en) | 1990-07-02 |
NO873400L (en) | 1988-02-15 |
SE8605120L (en) | 1988-02-15 |
PT85532A (en) | 1987-09-01 |
EP0258196A1 (en) | 1988-03-02 |
EP0258196B1 (en) | 1990-05-09 |
FI873520A0 (en) | 1987-08-13 |
SE8605120D0 (en) | 1986-11-28 |
NO873400D0 (en) | 1987-08-13 |
DE3762636D1 (en) | 1990-06-13 |
BR8704209A (en) | 1988-04-12 |
CA1285353C (en) | 1991-07-02 |
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ES2004803A6 (en) | A process for the preparation of sulphide-free alkali liquor. | |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
SA6 | Expiration date (snapshot 920101) |
Free format text: 2007-08-13 |
|
FD1A | Patent lapsed |
Effective date: 20010201 |